Friction-clutch.



H. THOMAS FRICTION CLUTCH.

APPLICATION FILED no.0, 1912.

Patented Sept. 15,

4 SHEETSSHEBT 1.

THE NORRIS PETERS C0., PHOTO-LVN), WASHINGTON. D. C.

H. THOMAS. FRICTION CLUTCH. APPLICATION nun no. 9, 19'12. 1 1 1 0,972, Patented Sept. 15, 1914.

4 SHEETS-SHEET 2.,

Sluwntcw M' n w w 2 m THE NORRIS PETERS CO.. PHOTU'LITHO. WASHINGTUN. D. C.

H. THOMAS.

FRICTION CLUTCH.

APPLICATION FILED mm. 9, 1912.

Patented Sept. 15,1914.

4 SHEETS-SHEE 3.

THE NORRIS PETERS C0. PHOTD-L|THO.. WASHINGTON, D. C.

H. THOMAS. TRIGTION CLUTCH.

APPLIOATION nun 11m 9, 1912.

1 ,1 1 0,972. Patented Sept. 15, 1914..

4 SHEETS-SHEET 4.

attozmzqo THE NORRIS PETERS CO., PHOTO-L-ITHO-I WASHINGYUN, D. E.

UNITED STATES PATENT- OFFIC.

HOPKIN THOMAS, OF GATASAUQUA, PENNSYLVANIA, ASSIGrNOl'P OF ONE-HALF T0 WILLIAM R. THOMAS, $3., 0F CATASAUQUA, PENNSYLVANIA.

FRICTION-CLUTCH.

Specification of Letters Patent.

Patented Sept. 15, 1914.

To all whom it mat concern:

Be it known tiat I, HOPKIN THOMAS, a

citizen of the United States, residing at Catasauqua, in the county of Lehigh and State of Pennsylvania, have invented certain new and useful Improvements inFriction-Clutches, and I do hereby declare the following to be a full clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains tomake and use the same. I

This invention relates to friction clutches and the object of the invention is to provide improved means for throwing the driven mechanism into engagement with the driving mechanism.

A further object of the invention is to provide mechanism for converting horizon- 'tal motion along the shaft into rotary motion, which rotary motion is converted into radial motion by other mechanism for setting the driven mechanism against the driving mechanism. 7

With these and other objects in view the invention comprises certain novel constructions, combinations, and arrangements of parts as will be hereinafter more fully described and claimed;

In the drawings :-Figure 1 is an end elevation of my invention looking at the driven member. Fig.2 is a section taken on line 2-2 of Fig. 1. Fig; 3 is a section on line 33 of Fig. 1. Fig. 4 is an end elevation of a modified form. Fig. 5 is a section taken on line 55 of Fig. 4. Fig. 6 isthe detail of the toggle used in the modified form shown in Figs. 4 and 5.

Like reference characters designate corresponding parts throughout the several.

VIEWS.

Generally this invention aims to provide a driving member having concentric flanges, a disk comprising a driven mem her, a ring associated with the disk, and

lever and toggle mechanism associated with the ring for forcing the oppositely moving shoes of the driven member against the flanges of the driving member, as the ring ectin flan es 3 and 4 which fian es are C b 7 D concentric with shaft 1. Keyed to a shaft 1- is a disk 5 having hubs 6 extending on either side thereof, the hubs presenting a comparatively large area for the support of the comparatively narrow disk 5. Extending from disk 5 is a plurality of lugs 7, six in number, as shown in Fig. 1, though any suitable number may be used. The sides of these walls extend preferably perpendicular to the plane of the disk 5 and adjacent walls of Adjacent lugs are made parallel so that there i s defined between adjacent lugs openings ,iaving parallel sides. The faces of the lugs 7 are provided with arcuate slots 8 which are adapted to receive a ring 9, which ring Ls concentric with shaft 1. Pivoted as at 10 to the ring 9 is a plurality of pairs-of toggle links, the outwardly extending member 11 of each pair of toggle links being pivoted to a. shoe 12, the outer surface of which is :urved to conform to the outline of flange 3. A reduced portion extending from'the shoe 12 forms a'tongue13, the sides of which are :ngaged by the lugs 7 the object of the lugs 13' being to guide the shoe 12 between the Lugs 7 so thatsaid shoes may move only in a radial direction. The other toggle link 14 )f each pair also pivoted at 10 is pivoted to a shoe 15, which shoes have outwardly extending lips 16, which lips are adapted to a Loosely engage the tongues 13, it being understood that the sides of the lips 16 engage the walls of adjacent lugs so that the shoes 15 may move only in a radial direction. By ;'eferring to Fig. 3'it will be seen that the ring 9 is mounted 'between the tongue 13 and the toggles 11 and 14. While this par- Jicular construction of the lip 16 and tongue 13 has been described, it is to be understood, of course, that their positions could be interchanged so that the outwardly extending lip 16 of the shoe1'5 wouldengage the ring '9. Passing through the ring 9 is a suitable oolt 17, the upper end of which is cylindrical and adapted to move in a slot 18 of an arm -l9,which arm is provided with a trunnion 2-0. Keyed to the trunnion 20.is an arm 21, curved as'shown in Fig. 1', and having swivally connected to the outer end 22 thereof link 23,which link 23 may be hinged to parallel ears extending from collar 24, or may be swivellyconnecte d tothe collar 24. In understanding the operation of setting the shoes against the flanges, it may be convenient to consider the arms 19 and 21 as constituting a lever, insomuch as the said arms are rigidly connected together. The line passing through the center of trunnion 20 and outer end 22 of the arm 21 is designed to pass considerably to one side of the center of the shaft 1, so that as theend 22 descends the arm 21 may be rotated about trunnion 20. Also, theline passing through the center of the trunnion and'the bolt 17 is designed to extend considerably to one side of the center of the shaft 1- Likewise;

Y line passing through the center of the shaft-1 the point where toggle link. 14 is pivoted tov shoe 15, andthe point where the toggle link 11 is pivoted to shoe 12 is'to one side of the pivoted point 10, sothat asrthe pivoted point 10 is drawn nearer this line the shoeswill be, separated.

In theojperation 'ofthis device,.when it is desired to throw. the driven member into engagement with they driving member. the collar .24 is moved;longitudinally .of'the shaft away from the driven member, at which time the link 23 will draw. end. 22 of ing the points where the toggle links engagetheir respective shoes, which will result in vthe separating of the shoes on a radial line,

such separation being guided by the tongues -13, and lips16 move between the parallel (sides of extending lugs 7 Inthemodified. form shown in Figs. 4,, 5,

and. (3, a plurality of levers 25-are shown as provided with slots 26 which engage bolts 27 carried by a ring 28 which ring 28 corresponds to the ring 9 in the form shown in 45.

Figs 1 and 2. In this form the toggle joints 28 shown more particularlyin Fig. 6 are provided with a central opening through which passes a bolt 29.the outer end of which is reduced and threaded to receive nuts for suitably securingsame to the disk 5, this bolt being keyed to the toggle joints 28. Oneend ofeachof the toggle joints 28 is provided with a trunnion 30 adapted to move in a semi cylindrical slot formed .in shoe 31, while the other end of the toggle joint is providedwith trunnions 32- adapted to be received by ,corresp'onding'semi-cy lin- .drical slots in theshoes 33. As-in the pre ferred form the line joining the centers of these trunnions. passes to one side of the center of the shaft, 1 One of the bolts 29 ;is extended as shownr 'at34, and'has keyed thereto anarm 35' to-the outer end 36 of which-is swivelly connected a link .37. Thislink 37 may be connected'to-the collar 24 in considerably to one sideof the center ofthe shaft 1. In the operation of this modified form, when it is desired to throw the driven member into engagement with driving memb er, the collar 24 is moved longitudinally of the shaft away from the driven member as in the preferred form, at which time the end 36 of the arm 35 will be drawn outwardly,

which will result in the-turning. ofzthe extendingend 34. By means of the adjacent lever .25 this turningmovemeht of the extending end '34 is conveyed to the ring 28',

and from ring 28 rotary motion is conveyed to the remaining toggle joints, 28 by means of their respective levers, 25. Inasmuch as the linepassing through trunnions 30 and 32 pass to one side of the center of the shaft,

as. the toggles turn shoe 31 will be drawn outwardly against flange and shoe 33 will be thrown inwardly against flange 1, at

which time the driven member will be made to revolve with shaft ,1

What I claim is v1. In a friction clutch, a driving member having concentric flanges, a driven. member comprising a set of shoes adjacent each flange, toggle jolnts lnterposed between the opposite shoes of the sets of shoes, the axes ofthe toggle links, formingthe toggle; joints passing to one. side of the" center of the flanges, a ring connected to the. toggle joints and means for, actuating the'ring.

v2. Ina friction clutch, a driving member, a disk forming a driven memben'a ring carried by. the disk, toggle joints actuated by the ring, shoes adapted to gripv the driving member and engaging the toggle joints,said shoes held against lateral movement with respect to the driven member, the axes of the toggle links forming the togglejoints passing to one side of the center of the ring, and means for rotating the ring.

3. In a friction clutch, adrivingmember, 1

having flanges integral therewith, a disk,..;

lugs formed integral therewith, adjacent sides ofadjacent lugs being parallel, shoes providedv with means for guiding the same between thelugs, said shoes being adapted the disk adapted to move the shoes relative to each other. I v 1 p 5. In a friction clutch, a driving member having concentric flanges integral therewith,

to engage the fianges, and means earned by a rotatable disk, a ring carried by the disk, shoes engaging thefianges, lugs carried by the disk and locatedbetween the shoes to guide the same, pairs of toggle links pivoted to the ring; one toggle link of each pair being pivoted to a shoe engaging the outer.

flange, the other toggle of each pair being pivoted to a shoe engaging the inner flange, and means for rotating thering.

6. In a friction clutch, a driving member having concentric flanges integral therewith, a disk, lugs formed integral with the disk, the adjacent sides of adjacent lugs being parallel, shoes engaging the flanges, projections extending from the shoes, said projections engaging the parallel sidesof adj acent lugs, and means mounted on the disk and engaging the shoes for moving the said shoes apart.

7 In a friction clutch, a driving member having concentric flanges integral therewith, a disk, lugs integral with the disk, the adjacent sides of adjacent lugs forming an opening having parallel si'des, shoes engaging eachflange, each shoe having a reduced portion extending therefrom and engaging the parallel sides of the opening, the reduced portions of the shoes engaging the sides of the openings, and engaging each other, a ring carried by the disk, means pivoted to theshoes and ring for moving the shoes to and from the flanges as the ring moves, and means for actuating the ring. I

8. In a friction clutch, a driving member having concentric flanges integral therewith, a disk, lugs formed integral with the disk, the adjacent sides of adjacent lugs .being parallel, shoes engaging the flanges, projections integral with the shoes andengaging the parallel sides of the lugs, a ring, toggle joints connected to the ring, some of the toggle links forming the toggle joints being pivoted to the shoes engaging the outer flange, others of the toggle links being pivoted to the shoes engaging the inner flange. w

9. In a friction clutch, a shaft having a driving member mounted thereon, a collar longitudinally movable on the shaft, a disk mounted on the shaft, a lever pivoted in the disk, a link connecting the collar and one end of the lever, a ring engaged by'the other end of the lever, toggle links carried by the ring, and shoes pivoted to the toggle links and adapted to engagethe driving member asthe lever moves the ring.

10. In a friction clutch, a shafthaving driven member mounted thereon, a collar driving member as'the ring rotates.

11. In a. friction clutch, a shaft having a driving member secured thereon, a collar loosely mounted on the shaft, a link pivoted to the collar, a disk mounted on the shaft, an arm pivoted in the disk, one end of the armbeing swivelly connected to the link, a ring, means for connecting the ring and the arm, and shoes associated with the ring and adapted to engage the driving member as the ring rotates.

12. In a friction clutch, a shaft having a driving member secured thereon, a collar slidable upon the shaft, a link pivoted to the collar, a disk mounted on the shaft, a lever pivoted in the disk, one arm of the lever being connected to the link, the other arm being slotted, a ring, a pin carried by the ring, and engaged by the slotted arm, shoes adapted to engage the driving member, and

mechanism associated withthe ring and 1 shoes for setting the shoes as the ring' rotates. p

13. In a friction clutch, a shaft having a driving member mounted thereon, a collar longitudinallymovable' on the shaft, a disk mountedon the shaft, a lever pivoted'to the disk, means associated with the collar and one arm of the lever for rotating the lever as'the collar slides on the shaft, a ring, the

other end of the lever engaging the ring and adapted to rotate the same as the lever HOPKIN THOMAS. Witnesses:

FRED G. TERWILLIGER,

CHAs. E. YATES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

